Bolt-heading machine



(No Model.)

S. P. GREEN. BOLT HEADING MACHINE.

N0.4Z4,97 5. Patented Apr. 8 1890.

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UNITED STATES PATENT FFICE.

SAMUEL F. GREEN, OF EST SOMERS, NENV YORK.

BOLT-HEADING MACHINE.

SPECIFICATION forming part of Letters Patent .No. 424,975, dated April8, 1890.

Application filed February 14:, 1888.

.To all whom it may concern.-

Be it known that I, SAMUEL F. GREEN, a citizen of the United States,residing at WVest Somers, county of Vestchester, and State of New York,have invented new and useful Improvements in Bolt- Heading Machines, ofwhich the following is a specification.

My invention relates to machines for making flat, round, and angularheads on bolts, screws, and rivets, and has for its objects thereduction of the number of handlings and other operations in the commonprocesses and the simplifying of the process of heading. I attain theseobjects by means set forth in the annexed specification, of which theaccompanying drawings form a part.

Figure I represents an elevation of the machine. Fig. II is a plan view;and Figs. III,IV, and V are details of the central features of themachine.

By reference to Fig. I it will be seen that a heavy bed-frame 1, restingupon legs 2 2, contains and supports all the parts of the machine. Thedriving pulley is upon the side of the machine opposite to the observeron the same shaft that bears the large pulley 3". Upon the right-handend of the bed 1 are a pair of grooved feed-rollers 17 17,the duty ofwhich is to feed into. the machine the bar from which the bolts are tobe made.

6 represents a revolving anvil having trunnions resting in the bearings5, and which at opposite ends is provided with dies 14 let, whichreceive and hold the iron that is to form the bolt. The iron is fed intothe die 14 on the right-hand side, where it iscut off by the shear 15.'The anvil 6 then makes a half-revolution, carrying the piece of ironover to the left side, as at 14:, when the hammer-head 16 is drivenagainst it with great force. A die 16 in the end of the slide 16" has aconccvity the shape of the bolthead to be formed, the iron being spreadout with in the concavity by the operation of the hammering. As theanvil makes another halfrevolution the completed bolt is forced from thedie and drops under the machine to the floor. The anvil receives anintermittent motion through the sector-wheels 8 and 5. The hammer head16" derives its motion through the connecting-rod 30 and an eccen-Serial No. 264,047. (No model.)

trio 31 on shaft 4, said shaft being revolved only at the proper timefor the operation of heading, in a manner to be described, through thebelt 8 and pulley 3".

ith this glance at the general operation of the machine, reference willnow be had to Fig. II. The manner of hanging the anvil (3 is hereclearly shown. Its trunnions rest in bearings 5 5. To one trunnion issecured the sector-wheel 5, which is operated by a similar wheel 8 onshaft 8. This shaft is supported on bearings attached to the under sideof the bed 1. Said shaft extends across the bed, and on its opposite enda gear-wheel 7 meshes into a pinion 7, which is keyed to theniain-driving-shaft 7, which also carries the driving-pulley 3.

By now referring to Figs. III. IV, and V the construction and operationof the anvil 6 will be made plain. It will be observed that the anvil ispierced vertically through the center with a square hole 11 andcentrally through the trunnions with a bearing for the spindle '12, thespindle carrying a cam 11. The trunnion is also longitudinally pierced,as shown by Figs. III and IV. The bore is adapted, first, to receiveplunger 12, whose large end is in contact with the cam 11. This plungerfits snugly, but is easily movable. The outer end of the bore isenlarged and adapted to receive a die 14., which is entered from withinby the small end 12 of the plunger 12. This die is also removable fromthe anvil, being interchangeable with others for different sizes ofbolts. For alonger bolt than that represented at 17 a plunger with ashorter small end 12 would be inserted. \Vith a shorter bolt a longerplunger would be used, the plunger being adapted to the length of thebolt. So if a larger or'smaller diameter of bolt were to be made the dieand plunger would correspond with it in diameters. The design is thatthe die shall snugly receive the bolt iron, and sometimes it may bedesirable to aid in removing the completed bolt to have the die slightlytapering from the bottom outwardly. The bolt iron is fed into the dies.at a proper heat for the heading operation.

The spindle 12,'through the trunnions of the anvil, is held stationaryby suitable means,

Fig. II representing a plate 13 secured to the end of the spindle andbolted to an edge of the trnmiion-bearing 5. The cam 11, being fast tothe spindle, is also held constantly in oncposition. 17, l ig. 1V,represents apiece of red-hot iron of suitable length ready for heading.At the right moment the anvil will. revolve in the direction indicatedby the arrow in Fig. III, the plunger 12 being undisturbed by the camll. and the iron .17 resting against the plunger 12". The anvil stopswhen it has made a half-revelution,when the headin operation takesplace. The anvil again moving in the direction of the arrow causes thecam 11 to act upon the plunger l2 l2, forcing the formed bolt 17 partlyfrom its seat in the die 1:c far enough to admit of its being graspedand withdrawn therefrom.

During the operation of cutting off the boltiron and heading the bolt itis of course necessary to prevent any movement of the anvil. This isaccomplished through the lever 10 10", as shown in Figs. II and V. A cam10, Fig. II, carried on the shaft 6, actuates the lever. The lever ispivoted on the shaft ti, which extends across the under side of themachine. The lever partakes of the bellcrank shape, and carries,preferably, a friction-roller in contact with. the cam 10, and on itsupper end has a projection 44, which ongages in a notch 45 in thetrunnion of the anvil. At proper intervals the cam releases the leverfrom the slots 4.5, admitting of the revolution of the anvil. Of coursethere is nothing new in this device.

The means employed for cutting oil? the bolt-iron or bolt ends are shownin Fig. I and in enlarged detail by Fi 'V.

27 represents a slide operating in the frame 26, Figs. I and II, theframe :36 being secured to the inside of the main frame of the machine.The slide 27 is provided at its lower end, preferably, with afriction-roller lb, and is operated intern'iittently by the cam 51,carried on shaft 8. The upper end of the slide projects into an armcarryinga shearing-die 15.

Between the feed-rollers l7 and the blade 15 a guide 41. is provided,through which the bolt-rod 17 is fed. The outer side of the guidecontains the die 4:0, with an opening suitable for the passage and thecuttin oil. of the bolt rod. Atthe proper moment cam 0 on the shaft 8,through the lever 9, causes the raising of the slide 27 and theconsequent cutting off of the bolt end by the shear l 5, as shown inFig. Y.

Now, in revolving the anvil o, as it is a 1 heav 7 mass and must bemoved b t the teeth in the wheels 8 and 5, it is plain that the first.impinging of the teeth must be like a hammer-blow to them, and theywould be liable to be broken. To overcome this liability it will beobserved in Fig. V that as the shear 15 begins to cut the red 17' thearm 27 of the slide 27 strikes the end of the anvil, and the upwardmovement of the arm, both in time and speed, being in unison with thatof the meeting of the sectors 8 and 5, aids the wheels in starting theanvil in. its revolut ions and relieves the wheels at their point ofgreatest strain.

For actuating the rollers 17 for feeding the heated iron into themachine the shaft carrying one of the rollers is extended, as shown inFig. II, so as to carry the ratehet-wheellfl, which is operated.intermittently through the lever :31 and connecting-rod 23, the latterbeing driven by the wheel 7, 24 represcntii'lg a wrist-pin in the wheel,and 22 a wrist-pin in the lever 21. A pawl 20, carried on the upper endof the lever 21, acts upon the teeth in the ratchet 19. The length offeed of the rod may be varied by changing the size of the ratchet-wheelor by having the wrist-pin 22 adjustable on the lever 21, when, byvaryin g its position between the shaft and the end of the lever, ofcourse the movement of the ratchet 20 would be varied. These devices areby no means new.

The hammer-head i6 is operated by the connectingrod 30, Fig. II, whichis connected to a cam 31 on shaft 1. The balance-wheel 4', which has thepulley I secured to it, is driven continuously. Upon the shaft 4 afriction or other clutch 1: may be affixed by means of a feather tooperate the balancewheel.

In Fig. II, I. represent a form of frictionwheel upon which I make noclaims. (I. represents a clutch grooved to receive the bifur cated end aof the lever Independent segments (1 lie within the rim of thebalanccwheel, and are connected with the clutch by the rods I). Bythrowing the cl utch c away from the bearing 1-" the effect through thearms Z) is to force the segments cl out against the balancenvhcel rimwhen the motion of the balance-wheel is imparted to the shaft. Theclutclrlever 32 is pivoted in the main frame at 33, Fig. II, and isoperated by a cam on shaft 7".

In the construction of this machine I do not wish to be restricted tothe specific forms of the various parts so long as the principles of myinvention are embodied.

Having described my invention, what I claim, and desire to secure byLetters latout, is--* 1. The combination, in a bolt-heading machine, ofa frame 11., supporting a main shaft 7", a balance-wheel shaft 4t,provided with the d riving-pulley 4c, balance-wheel 4/, frictionclutch cu t), operated by lever 32 and cam on shaft 7, and cam 31, a hammer-headoperated by the cam 31 through the connecting-rod St a revolving anvil0, supported in bearings 5 5, and operated intermittently through thesector-wheels 5 8 and wheel 7 on the shaft 8 and pinion 7 on. the mainshaft 7, a lever 10, actuated. by cam 10 to hold the anvil. stationarywhile the sectorwheels are disengaged, bolt-rod'feeding rollers 17,actuated by wheel 7 through the connecting-rod 22}, wrist-pin 22, lever21, pawl 20,

and ratchet-wheel 19, and a cutting-off shear 15, attached to slide 27,said slide actuated by 1ever 9 and cam 9, all substantially as shown anddescribed.

2. In combination with the revolving anvil, as described, having notches45 in one of its trunnions sides, the lever 10' 10", pivoted on shaft 42and operated by a cam 10 on shaft 8, substantially as described.

3. In combination with the revolving anvil and rod-shearing-slide 27,substantially as described, the projection 27on the arm 27, adapted tostrike the end of the anvil, substantially as and for the objectdescribed.

4. In combination with an elongated revolving anvil, as described, thesector-wheel 5, secured to one of the trunnions oi the anvil,-sector-Whcel S and wheel '7' on shaft 8 pinband-Wheel 4, balance-Wheel4', with friction and clutch mechanism operatedthrough lever 32 and cam85, substantially as described, and cam 31, operating the headingslide16 through the connecting-rod 30, all substantially as shown anddescribed.

SAMUEL F. GREEN.

WVitnesses:

WILLIAM A. HUNT, SAMUEL G. FROST.

